Lock



in. 2, 1923a r 1,440,782

C. KEMP.

I Look. FILED MAY 11. 1922. 3 suazrs-s 'usa'r l Fatented Jan. 2?, 1%23.

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CHARLES KEMP, OF NEW YORK, N. Y.

noon.

Application filed May 11,

My improvements relate to looks for doors 7 and .other analogous closures, and are designed to attain a simple, inexpensive, but substantial burglar proof jamb staple lock of few parts, in which the operative mechanism is effectually protected and concealed in locked position,--the invention consisting in specific construction, combination and arrangement of parts and appurtenances herein described andclaimed, and a distinctive feature being the automatic bolt jaws used in conjunction with a jamb staple having cam surfaces for contactual engagement with said bolt jaws, substantially in the manner and for the purposes hereinafter fully set forth. I

In the accompanying drawings I exemplify a practical embodiment'of the essential features of m improvements in a doorjamb lock of simp e construction, although I do not limit myself to the identical form of component parts shown, since various modifications and equivalent mechanical expedients may be resorted to in detail with like re sult, and without departing from thespirit and intent of my invention in this respect.

With this understanding Fig. 1, represents a vertical sectional ele-.

Vation taken upon plane of line. 1-1, Fig. 4,-

' and showing an interior view of the lock casing, with the bolt thrown and its spring jaws in engagement with the jamb staple:

Fig. 2, isa like view, showing theposition of the parts when the bolt and its spring jaws are retracted:- 1

Fig.' 3, is an elevation of the side of the bolt slide adjacent to base plate of the casmg: i I i F ig. 4, is a sectional elevation of the lock taken upon the general plane of the zigzag line 4-4 indicated on Fig. 2, and showing the operative parts in the same relative positions as in said Fig. 2:

Fig. 5, is a face view of one form of jamb staple plate: a Fig. 6, ,isan' end elevation thereof, taken at right anglesto Fig. 5:

Fig. 7 ,is afaceviewof another form of 1922. Serial No. 560,129.

jambstaple plate adapted for use in conjunction with my automatic jaw bolt:

Fig. 8, is an end elevation thereof, taken at right angles to Fig. 7: Figs. 9 and 10 are detail views, taken at right angles to each other, of the tumbleractuated cam arm coupling piece:

casing:

Fig.- 12, is a sectional view thereof, taken upon plane of line 12-12, F ig. 11: Fig. 13, is a detail view of the twin auto matic jaws of the lock bolt:

Fig. 14 is an edge view thereof, takenon a plane at right angles to Fig. 13:

F 15,- is a diagrammatic detail illustratmg the relation of the contactual shoulders on the automatic jaws of the bolt to those on the casing:

Fig. 16, is an elevation of the side'of the slide bolt opposite to that shown inFig. 3:

Fig. 17, is an edge view of said bolt taken at right angles to Fig. 16': j

Fig. 18, is an elevation of the inner side of the casing cover plate: and

I Fig. 19, isan edge view thereof taken at right angles to Fig. 18.

' Fig. 20, is a detached detail view of a portion of Fig. 1, illustrating-the function of the latch thrust arm.

Fig. 11, is an inner side elevation of the Fig. 21, is an outside view of thecover plate, on a reduced scale. I

The casing of the operative parts of my improved lock consists of the base plate B formed with the enclosing side walls I), b and the cover plate 0, which is secured to said base plate B, by means of screws, the heads of which bear upon the sides of the chamfered holes b, b, b, inthe base plate B, and the threaded shanks of. which engage with female threads in the screw posts 0, 0, c,

onthe inner side of the cover plate C. The

look, as a unitary structure is secured to the inner side of the door D, or other closure to be protected, by attaching screws passing through the screw holes 0, 0, 0', 1n the cover plate C, (see Fig. 21) and through coincidental screw holes 6 b 72 in the base plate B, in a manner Well known in the art.

The staple plate S, is secured to the jamb, J, of the door in the usual manner, and is integral with the staple or keeper S, known technically as the striker. The base plate B, isv formed with a transverse'slot b and the cover-plate C, with a coincidental transv 55 tends-constant y to close the jaws a, a, but

verse slot for the accommodation of the striker S, the outer portion of which protrudes through both, as shown in Fig. A when the door D is closed. By this construction the casing. of the lock is utilized to the fullest extent to reinforce the "striker S, and sustain it against-lateralv pressure and stress during use, the-cover O, functioning in this I respect as well as. the base plate 15.

The staple or striker S, is formed with a central post 8, having lateral cross extensions 8', 8., as shown moreparticularly in Figs.

' 5, 7 and 8. These lateral extensions sf, 8',

in the referred form shown in Figs. 1, 2 and 5, of t e-drawings, are united integrally at their outer extremities with the staple plate S by side posts s 8 as shown more particu arly in said Fig. 5, whereas in themodificat-ion shown in Figs? 7 and-8 these side posts are omitted. In either case the medial portion 8", of the central post 8, is cam shaped in cross section for a -purpose hereinafter set forth. Thus in Figs. 7 and 8, said medial-portion 8", of the central post 8, is cylindrical, or circular in cross section whereas in Figs. 1, 2 and 5-the cross section of said the head a of the bolt slide A, as shown. more particularly in Figs. 1 and 2. The same I medial ortion 3* of the post 8, is square, the

angles t ereof presenting inclined planesurfaces as relatedv to the central alignment of the spring jaws a, a, pivotally! mounted on eyflect of cam surface is attained in the modification shown in Figs. 7 and 8 by the circular cross section of said of the osts. 3 a

The ead a, of. the bolt slide A, on the side-thereof next the base plate B, is formed medial portion 3 i I with parallel shoulders a at, which rest between/and engage with parallel ways b, 'b, on the inner side of the base plate B and the tailof said bolt slide A', is formed with a lug a", which rests and travels in a ,slot b formedin said base plate 'B, the

parallcl sides of said slot 6 acting in conunction with the parallel ways b .b to maintain the alignment of said'bolt slideA.

The bolt spring jaws a, a,.are' fulcrumed on the-studsa", a", on the bolthead a, and have an' expansion spring e, interposed between their ',rear arms, the r frontal jaws being concavely recessed toaccommodate the .med al cam portion 8? of the staple or striker posts, as shown more particularly in Fig.1,

ofthe dr'awin Said expansion spring e allows-them to yield when their 'forward "edges or tips encounter the medial cam suraws pivotally mounted'on said 7 member'and adapted to automatically en V gage with and release themselvesfi'om'said V formed with protuberant shoulders a o for engagement, when the bolt A, is thrust forward, with shoulders h, 6", formed for thepurpose on the inner front side wall of the base plate B, as shown in Fig. 1, of

the drawing, therebypreyenting the spreading apart of said spring aws a, a, while'the parts are in locked co-relation. lln other words, said jaws a, a, cannot be tampered with nor opened up by extraneous means,

other than the latch knob IL, or a key! insorted in the tumbler cylinder T, in a manner Well known in the art.

p It will be seen thatthe main novelty and distinctive feature of the present invention consists in the provision of the automatically actuating spring jaws a, a, in conjunction with a striker post 8, forming duplex cam surfaces reversed as related to each other so as to spread the said spring-jaws apart when the bolt slide A,-is moved in either direction; incidental features in connection therewith being the reinforcing shoulders I)", b", on

the lock casing, for engagement with corresponding shoulders a, a on the tips of said spring jaws, for the purposeof sustaining the latter in locked position; and the protrusion of the striker S, through both plates or the lock casing so as to reinforce and sustain said striker and the jamb staple plate S, against lateral stress and, displacement.

Hence, while ll herein showv and de'scrihe suitable mechanism for moving the bolt slide A, in either or both directions, by means of a latch knob 1L, and thrust arm Z,

or a key tumbler thrust arm 15, in a'manner well known in the art, ll do not wish to limit myself in this respect, the same being shown incidentally as part of a lock of this type.

By my invention ll attain, practically, a

jimmy proof lock of few parts and simple construction and operation, espec adapted to the protection of dwellings or in fact any enclosure to be safe-guarded against burglars, or unlawful entry.

. What I claim as my invention and d. to secure by'lhetters Patent is,

1. In lock mechanism of the character dQEi 'ignated, the combination of a lock ca a: a jamb staple formed with a striker pest having reversed duplex cam surfaces, a slidable the same in opposite directions, and

cam striker post, substantially in the man;

bolt member and means for actuating;

l 1 1i: Slid able bolt,

mr and for the purpose setforth'm 2. In lock mechanism of the character des lee ignated, the-combination of a lock having plates with slots, a staple formed with astriker post ha reversed. 3

duplex cam surfaces, a slidahle bolt member. and means for actuatingthgemgihhPPa ,throughsaid slots formed for the purpose in both plates of the lock casing substantially in the manner and for the purposedescribed.

3. In lock mechanism of the character designated, the combination of a lock; casing having plates with slots, a jamb staple formed'with a striker post having reversed duplex cam surfaces, a slidable bolt member and means 'for actuating the same in op posite directions, and spring jaws pivotally,

mounted on said slidable bolt member and adapted to automatically engage-with and release themselves from said cam striker post, the latter being formed with transverse arms which extend. protuberantly through said slots formed for the purpose in both plates of the lock casing, substantially in the manner and for the purpose described;

'4. In lock mechanism of the character designated, the combination of a lock casing with reinforcing shoulders, a jamb staple formed with a striker post having reversed duplex cam surfaces, a slidable bolt' member and means for actuating the same'in opposite directions, and spring jaws pivotally mounted on said slidable' bolt member and adapted to automatically engage with and.

release themselves from said camstriker post, said spring jaws being formed withshoulders adjacent to their opposed tips for engagement with said reinforcing shoulders on the lock casing, substantially in the manner and for the'purpose set forth.

CHARLES KEMP. 

